mechanical calculator

mechanical machine for arithmetic operations for absolute calculators

en-GB/mɪˈkænɪkl ˈkælkjʊleɪtə/
en-US/məˈkænɪkəl ˈkælkjəˌleɪtɚ/

دسته بندی ها:

machineinventionmathematical instrumentcalculating tool